The team searches for a killer who calls the authorities before committing his crimes; as Rossi prepares for a visit with his daughter, he gets news about the death of an old friend.
The Pearsons come together to celebrate Kate and Toby's wedding.
Ducky is attacked by a man who claims to have information about his half-brother, who died decades earlier; Jake and Bishop talk about their future.
McGarrett and Lynn's date on a deserted island turns deadly when a mob boss gets involved; a gambler abducts a high-school football star's father in hopes of forcing the athlete to throw a game.